diff options
Diffstat (limited to 'drivers/net/mlx4/cmd.c')
| -rw-r--r-- | drivers/net/mlx4/cmd.c | 443 |
1 files changed, 0 insertions, 443 deletions
diff --git a/drivers/net/mlx4/cmd.c b/drivers/net/mlx4/cmd.c deleted file mode 100644 index 23cee7b6af9..00000000000 --- a/drivers/net/mlx4/cmd.c +++ /dev/null @@ -1,443 +0,0 @@ -/* - * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. - * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. - * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the - * OpenIB.org BSD license below: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/pci.h> -#include <linux/errno.h> - -#include <linux/mlx4/cmd.h> - -#include <asm/io.h> - -#include "mlx4.h" - -#define CMD_POLL_TOKEN 0xffff - -enum { - /* command completed successfully: */ - CMD_STAT_OK = 0x00, - /* Internal error (such as a bus error) occurred while processing command: */ - CMD_STAT_INTERNAL_ERR = 0x01, - /* Operation/command not supported or opcode modifier not supported: */ - CMD_STAT_BAD_OP = 0x02, - /* Parameter not supported or parameter out of range: */ - CMD_STAT_BAD_PARAM = 0x03, - /* System not enabled or bad system state: */ - CMD_STAT_BAD_SYS_STATE = 0x04, - /* Attempt to access reserved or unallocaterd resource: */ - CMD_STAT_BAD_RESOURCE = 0x05, - /* Requested resource is currently executing a command, or is otherwise busy: */ - CMD_STAT_RESOURCE_BUSY = 0x06, - /* Required capability exceeds device limits: */ - CMD_STAT_EXCEED_LIM = 0x08, - /* Resource is not in the appropriate state or ownership: */ - CMD_STAT_BAD_RES_STATE = 0x09, - /* Index out of range: */ - CMD_STAT_BAD_INDEX = 0x0a, - /* FW image corrupted: */ - CMD_STAT_BAD_NVMEM = 0x0b, - /* Error in ICM mapping (e.g. not enough auxiliary ICM pages to execute command): */ - CMD_STAT_ICM_ERROR = 0x0c, - /* Attempt to modify a QP/EE which is not in the presumed state: */ - CMD_STAT_BAD_QP_STATE = 0x10, - /* Bad segment parameters (Address/Size): */ - CMD_STAT_BAD_SEG_PARAM = 0x20, - /* Memory Region has Memory Windows bound to: */ - CMD_STAT_REG_BOUND = 0x21, - /* HCA local attached memory not present: */ - CMD_STAT_LAM_NOT_PRE = 0x22, - /* Bad management packet (silently discarded): */ - CMD_STAT_BAD_PKT = 0x30, - /* More outstanding CQEs in CQ than new CQ size: */ - CMD_STAT_BAD_SIZE = 0x40, - /* Multi Function device support required: */ - CMD_STAT_MULTI_FUNC_REQ = 0x50, -}; - -enum { - HCR_IN_PARAM_OFFSET = 0x00, - HCR_IN_MODIFIER_OFFSET = 0x08, - HCR_OUT_PARAM_OFFSET = 0x0c, - HCR_TOKEN_OFFSET = 0x14, - HCR_STATUS_OFFSET = 0x18, - - HCR_OPMOD_SHIFT = 12, - HCR_T_BIT = 21, - HCR_E_BIT = 22, - HCR_GO_BIT = 23 -}; - -enum { - GO_BIT_TIMEOUT_MSECS = 10000 -}; - -struct mlx4_cmd_context { - struct completion done; - int result; - int next; - u64 out_param; - u16 token; -}; - -static int mlx4_status_to_errno(u8 status) -{ - static const int trans_table[] = { - [CMD_STAT_INTERNAL_ERR] = -EIO, - [CMD_STAT_BAD_OP] = -EPERM, - [CMD_STAT_BAD_PARAM] = -EINVAL, - [CMD_STAT_BAD_SYS_STATE] = -ENXIO, - [CMD_STAT_BAD_RESOURCE] = -EBADF, - [CMD_STAT_RESOURCE_BUSY] = -EBUSY, - [CMD_STAT_EXCEED_LIM] = -ENOMEM, - [CMD_STAT_BAD_RES_STATE] = -EBADF, - [CMD_STAT_BAD_INDEX] = -EBADF, - [CMD_STAT_BAD_NVMEM] = -EFAULT, - [CMD_STAT_ICM_ERROR] = -ENFILE, - [CMD_STAT_BAD_QP_STATE] = -EINVAL, - [CMD_STAT_BAD_SEG_PARAM] = -EFAULT, - [CMD_STAT_REG_BOUND] = -EBUSY, - [CMD_STAT_LAM_NOT_PRE] = -EAGAIN, - [CMD_STAT_BAD_PKT] = -EINVAL, - [CMD_STAT_BAD_SIZE] = -ENOMEM, - [CMD_STAT_MULTI_FUNC_REQ] = -EACCES, - }; - - if (status >= ARRAY_SIZE(trans_table) || - (status != CMD_STAT_OK && trans_table[status] == 0)) - return -EIO; - - return trans_table[status]; -} - -static int cmd_pending(struct mlx4_dev *dev) -{ - u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET); - - return (status & swab32(1 << HCR_GO_BIT)) || - (mlx4_priv(dev)->cmd.toggle == - !!(status & swab32(1 << HCR_T_BIT))); -} - -static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param, - u32 in_modifier, u8 op_modifier, u16 op, u16 token, - int event) -{ - struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd; - u32 __iomem *hcr = cmd->hcr; - int ret = -EAGAIN; - unsigned long end; - - mutex_lock(&cmd->hcr_mutex); - - end = jiffies; - if (event) - end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS); - - while (cmd_pending(dev)) { - if (time_after_eq(jiffies, end)) - goto out; - cond_resched(); - } - - /* - * We use writel (instead of something like memcpy_toio) - * because writes of less than 32 bits to the HCR don't work - * (and some architectures such as ia64 implement memcpy_toio - * in terms of writeb). - */ - __raw_writel((__force u32) cpu_to_be32(in_param >> 32), hcr + 0); - __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful), hcr + 1); - __raw_writel((__force u32) cpu_to_be32(in_modifier), hcr + 2); - __raw_writel((__force u32) cpu_to_be32(out_param >> 32), hcr + 3); - __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4); - __raw_writel((__force u32) cpu_to_be32(token << 16), hcr + 5); - - /* __raw_writel may not order writes. */ - wmb(); - - __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT) | - (cmd->toggle << HCR_T_BIT) | - (event ? (1 << HCR_E_BIT) : 0) | - (op_modifier << HCR_OPMOD_SHIFT) | - op), hcr + 6); - - /* - * Make sure that our HCR writes don't get mixed in with - * writes from another CPU starting a FW command. - */ - mmiowb(); - - cmd->toggle = cmd->toggle ^ 1; - - ret = 0; - -out: - mutex_unlock(&cmd->hcr_mutex); - return ret; -} - -static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, - int out_is_imm, u32 in_modifier, u8 op_modifier, - u16 op, unsigned long timeout) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - void __iomem *hcr = priv->cmd.hcr; - int err = 0; - unsigned long end; - - down(&priv->cmd.poll_sem); - - err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, - in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0); - if (err) - goto out; - - end = msecs_to_jiffies(timeout) + jiffies; - while (cmd_pending(dev) && time_before(jiffies, end)) - cond_resched(); - - if (cmd_pending(dev)) { - err = -ETIMEDOUT; - goto out; - } - - if (out_is_imm) - *out_param = - (u64) be32_to_cpu((__force __be32) - __raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 | - (u64) be32_to_cpu((__force __be32) - __raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4)); - - err = mlx4_status_to_errno(be32_to_cpu((__force __be32) - __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24); - -out: - up(&priv->cmd.poll_sem); - return err; -} - -void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - struct mlx4_cmd_context *context = - &priv->cmd.context[token & priv->cmd.token_mask]; - - /* previously timed out command completing at long last */ - if (token != context->token) - return; - - context->result = mlx4_status_to_errno(status); - context->out_param = out_param; - - complete(&context->done); -} - -static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param, - int out_is_imm, u32 in_modifier, u8 op_modifier, - u16 op, unsigned long timeout) -{ - struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd; - struct mlx4_cmd_context *context; - int err = 0; - - down(&cmd->event_sem); - - spin_lock(&cmd->context_lock); - BUG_ON(cmd->free_head < 0); - context = &cmd->context[cmd->free_head]; - context->token += cmd->token_mask + 1; - cmd->free_head = context->next; - spin_unlock(&cmd->context_lock); - - init_completion(&context->done); - - mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, - in_modifier, op_modifier, op, context->token, 1); - - if (!wait_for_completion_timeout(&context->done, msecs_to_jiffies(timeout))) { - err = -EBUSY; - goto out; - } - - err = context->result; - if (err) - goto out; - - if (out_is_imm) - *out_param = context->out_param; - -out: - spin_lock(&cmd->context_lock); - context->next = cmd->free_head; - cmd->free_head = context - cmd->context; - spin_unlock(&cmd->context_lock); - - up(&cmd->event_sem); - return err; -} - -int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param, - int out_is_imm, u32 in_modifier, u8 op_modifier, - u16 op, unsigned long timeout) -{ - if (mlx4_priv(dev)->cmd.use_events) - return mlx4_cmd_wait(dev, in_param, out_param, out_is_imm, - in_modifier, op_modifier, op, timeout); - else - return mlx4_cmd_poll(dev, in_param, out_param, out_is_imm, - in_modifier, op_modifier, op, timeout); -} -EXPORT_SYMBOL_GPL(__mlx4_cmd); - -int mlx4_cmd_init(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - - mutex_init(&priv->cmd.hcr_mutex); - sema_init(&priv->cmd.poll_sem, 1); - priv->cmd.use_events = 0; - priv->cmd.toggle = 1; - - priv->cmd.hcr = ioremap(pci_resource_start(dev->pdev, 0) + MLX4_HCR_BASE, - MLX4_HCR_SIZE); - if (!priv->cmd.hcr) { - mlx4_err(dev, "Couldn't map command register."); - return -ENOMEM; - } - - priv->cmd.pool = pci_pool_create("mlx4_cmd", dev->pdev, - MLX4_MAILBOX_SIZE, - MLX4_MAILBOX_SIZE, 0); - if (!priv->cmd.pool) { - iounmap(priv->cmd.hcr); - return -ENOMEM; - } - - return 0; -} - -void mlx4_cmd_cleanup(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - - pci_pool_destroy(priv->cmd.pool); - iounmap(priv->cmd.hcr); -} - -/* - * Switch to using events to issue FW commands (can only be called - * after event queue for command events has been initialized). - */ -int mlx4_cmd_use_events(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - int i; - - priv->cmd.context = kmalloc(priv->cmd.max_cmds * - sizeof (struct mlx4_cmd_context), - GFP_KERNEL); - if (!priv->cmd.context) - return -ENOMEM; - - for (i = 0; i < priv->cmd.max_cmds; ++i) { - priv->cmd.context[i].token = i; - priv->cmd.context[i].next = i + 1; - } - - priv->cmd.context[priv->cmd.max_cmds - 1].next = -1; - priv->cmd.free_head = 0; - - sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds); - spin_lock_init(&priv->cmd.context_lock); - - for (priv->cmd.token_mask = 1; - priv->cmd.token_mask < priv->cmd.max_cmds; - priv->cmd.token_mask <<= 1) - ; /* nothing */ - --priv->cmd.token_mask; - - priv->cmd.use_events = 1; - - down(&priv->cmd.poll_sem); - - return 0; -} - -/* - * Switch back to polling (used when shutting down the device) - */ -void mlx4_cmd_use_polling(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - int i; - - priv->cmd.use_events = 0; - - for (i = 0; i < priv->cmd.max_cmds; ++i) - down(&priv->cmd.event_sem); - - kfree(priv->cmd.context); - - up(&priv->cmd.poll_sem); -} - -struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev) -{ - struct mlx4_cmd_mailbox *mailbox; - - mailbox = kmalloc(sizeof *mailbox, GFP_KERNEL); - if (!mailbox) - return ERR_PTR(-ENOMEM); - - mailbox->buf = pci_pool_alloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL, - &mailbox->dma); - if (!mailbox->buf) { - kfree(mailbox); - return ERR_PTR(-ENOMEM); - } - - return mailbox; -} -EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox); - -void mlx4_free_cmd_mailbox(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox) -{ - if (!mailbox) - return; - - pci_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma); - kfree(mailbox); -} -EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox); |